Perhaps you should try some spelling variations:
communication cohesion » communication collections, communication control, communication cost
basic extension » basics extensions, basins extension, based extension
cohesion basic » cohesion based, conversion basic, cohesion brain
array range » ray range
arrays ang » arrays a
array ang » array along, array nano, array a

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: communication cohesion basic extension ((((array ang) OR (array range))) OR (arrays ang))~.
• Adding a wildcard symbol may retrieve word variants: communication cohesion basic extension ((((array ang) or (array range))) or (arrays ang))*.